shrinking at round faces with support material
Hi there,
any advice how to have a better surface finish. Material PLA Prusament, Temperature 205 C, layer high 0,2mm.
Thanks
Stefan
if you can imagine it - if you can design it - you should print it!
Make the impossible - possible!
RE: shrinking at round faces with support material
2nd picture
if you can imagine it - if you can design it - you should print it!
Make the impossible - possible!
RE: shrinking at round faces with support material
Supports are one of the weaknesses of the current versions (2.4 is supposed to contain many support improvements). Looking at the picture you posted I don't think you are going to get anything much better printing it like that.
If you save your project (File>Save Project as). Take the resulting .3mf file and ZIP it up into an archive you can then attach it here. It must be zipped or the forum wont accept it.
With a project file we can see all your settings and the model and you are far more likely to receive useful suggestions on ways to improve things.
RE: shrinking at round faces with support material
Reorient the part so you do not need round sections supported. From your pictures (partial part shots) it may be as simple as reorient the part to print vertically.
RE: shrinking at round faces with support material
here is the 3mf file. I will try to reorientate as well.
if you can imagine it - if you can design it - you should print it!
Make the impossible - possible!
RE: shrinking at round faces with support material
sorry this is everything
if you can imagine it - if you can design it - you should print it!
Make the impossible - possible!
RE: shrinking at round faces with support material
Something like in the attached 3mf project. I also made a few minor changes, mainly on the default support settings but also increased the perimeter count to get rid of most of the solid infill it was adding to the sloped walls. The solid infill will shake the printer and uses more material and increases the print time more than just increasing perimeters will. Your part ends up stronger too.
RE: shrinking at round faces with support material
I did try twice, even jused my brand new steel sheet, where I believe they have a special coating on top - a glue kind of thing. The more you print the more it wears off. 50 layers support I used ....
Any other suggestions?
if you can imagine it - if you can design it - you should print it!
Make the impossible - possible!
RE: shrinking at round faces with support material
To me it looks like your sheet isn’t clean. Classic adhesion problem. Clean it properly and make sure your live z is set correctly and it will stick.
Also that’s a different model to the one you posted. That’s going to have less contact due to the point so I would have added in a small extra disc using a modifier to give it a bit more to initially start with.
If I didn’t have my printer slated for prints all weekend I’d print one just to demonstrate that it will print.
RE: shrinking at round faces with support material
I quickly modeled a similar 3 cylinder version like in your last pic and fit in it my print queue.
Just printed it with the filament that was loaded ( a basic black pla) and at a rough 0.24 layer height without doing any optimizations just to show that orienting the part this way will print fine if your bed is clean and the live z is correct.
My bed isn't even particularly clean as it's been 2 weeks since I cleaned it with anything. I've been printing lots of stuff on it this week too. I've just been very careful not to touch it at all so I don't need to clean yet. You can see the marks of previous prints but that doesn't effect adhesion, its the skin oils and grease that gets on there that is a problem. The thinnest layer that you cant even see can cause loss of adhesion.
The smooth steel sheets are coated with a pei 'sticker'. There is no special coating beyond that. Its doesn't really wear off. The sheet pictured is 3+ years old, its my original one. Its just cleaned regularly with fairy liquid and hot water. I don't use ipa or anything else on it to clean.
Occasionally they can build up a layer of stuff, often left over when printing pla, that can reduce adhesion. I've seen it referred to as sugar, dont know if it actually is sugar but its a whitish coating. The dish soap keeps most of that off too. Eventually though you need to refresh the sheet with a sparing clean with acetone. But only rarely and carefully as acetone can cause it to go brittle and crack. I think I've done that 2-3 times in the time I've had it.
RE: shrinking at round faces with support material
Thanks for your time Neophyl and for your advices the round_faces_original.zip does carry the real "cross".
if you can imagine it - if you can design it - you should print it!
Make the impossible - possible!